Book stand



FIG. 1: shows a perspective front and top view of a book stand showing the design applied thereto;

FIG. 2: shows a front elevational view thereof;

FIG. 3: shows a rear elevational view thereof;

FIG. 4: shows a top plan view thereof;

FIG. 5: shows a bottom pan view thereof;

FIG. 6: shows a first side elevational view thereof; and,

FIG. 7: shows a second side elevational view thereof. 

I claim the ornamental design for a book stand, as shown and described. 